Revert "Fixes #1267."

Revert due to V8 downgrade.

This reverts commit 04c9169892.

test/simple/test-repl.js

@@ -118,7 +118,7 @@ function error_test() {
     // invalid input to JSON.parse error is special case of syntax error,
     // should throw
     { client: client_unix, send: 'JSON.parse(\'{invalid: \\\'json\\\'}\');',
-      expect: /^SyntaxError: Unexpected token i/ },
+      expect: /^SyntaxError: Unexpected token ILLEGAL/ },
     // Named functions can be used:
     { client: client_unix, send: 'function blah() { return 1; }',
       expect: prompt_unix },